Pumping-jack.



Patented DLC 17,1918

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EIJZA RI-IODY, 0F FARMLAND, INDIANA.

PUMPINGr-J'ACK.

Application led May 1, 1918.

To all whom t may concern.'

Be it known that I, ELZA RHoDY, a citizen of the United States, residingat Farmland, in the county of Randolph and State of Indiana, haveinvented certain new and useful Improvements in Pumping-Jacks, of whichthe following is a specification.

The present invention relates to improvements in pumping jacks capableof being operated either manually or from a suitable source of power.

My object has been to provide a simple construction comprising rotarydriving instrumentalities embodying cam elements so arranged as toimpart reciprocatory motion to a pump operating element, saidconstruction affording a very smooth action and eliminating the suddenor jerky actuation of the pump operating element as is usually the casein conventional types of pumping jacks.

With the above and other objects in view, this invention consists in theconstruction, combination and arrangement of parts, all as hereinaftermore fully described, claimed and illustrated in the accompanyingdrawing, wherein:

Figure l is a front elevation of a piunping jack constructed inaccordance! ywith my invention.

Fig. 2 is a vertical sectional view on the line 2&2 of Fig. l.

Fig. 3 is a side elevation; and

Figs. l and 5 are sectional views on the lines 4 4 and 5-5 respectivelyof Fig. l.

Referring to the drawings and specically describing the device, lindicates a frame which in the present instance is rectangular in shapeand has at its base a socket or sleeve 2 carrying a set screw 3 by meansof which the frame with its mechanism support-ed thereby may be mountedupon a well casing, pipe or the like indicated at 4. The usual pump rod5 shown in dotted lines is designed to be actuated by the mechanism nowto be described. Said rod is connected to one end of what I term for thepurposes of this description a connecting member 6. The upper end of thelast-named member is provided with a cross-head or pin 7 preferablyhaving anti-friction rollers 8 thereon. The head projects laterally intoslots 9 of brackets l0, there being one of such brackets secured to theinner side of each side member of the frame 1. Also mounted in theframes and in spaced relation to each other are Specification of LettersPatent.

Patented Dec. 17, 1918.

Serial No. 231,925.

upper and lower shafts l1, 1l', the latter eX- tending through slots 6in the pump rod connector 6, each of said shafts carrying wiper cams orvolute cams l2. The cams are secured to their respective shafts by meansof set screws 13 and obviously they may be adjusted with respect totheir relative positions by means ofthe set screws just mentioned.

At one end each of the shafts ll, ll carries -a relatively large gear 14and a pinion l5 arranged intermediate the two gears and meshingtherewith provides for the rotation of the shafts ll, ll and camsmounted upon the same. The pinion l5 is carried by a short shaft 16journaled in one side of the frame l and a suitable bracket la, saidshaft having mounted thereon a fly-wheel 17 and a further pinion 1Soperable by the drive gear 19. The last-mentioned gear is suitablyactuated either by a source of power or manually through theinstrumentality of the clutch pulley 20, the details of the constructionof which are not herein given inasmuch as they form the subject mattterof a separate application.

The operation of the device will be apparent from the foregoingdescription, it merely suiticing to state that the cams l2 are arrangedto impinge the crosshead 7 of the connector 6 for the pump rod so as topositively move the same upwardly and downwardly, guided by the brackets10, and the coaction of the shafts l1 with the slots 6 the wiping actionof the cams being so adjusted that when one is about to leave the crosshead the other contacts therewith for actuation of said head in theopposite direction.

The device is simply constructed and is designed to take the place ofthe ordinary pumpin respect to the well casing or the pumping jack maybe otherwise operatively connected so as to actuate the pump rod in themanner hereinbefore described.

Having thus described my invention, what I claim as new is:

l. In pumping apparatus of the class described, the combination with apump rod, of a frame, a pump rod connector connected at one end with thepump rod and having a cross pin at its other end, guide bracketsattachedto the frame and slotted to receive the cross pin, cams mountedin the frame between the brackets and at opposite sides of the cross pinfor impinging the latter to impart reciprocatory motion to the connectorand pump rod, and means for revolving 'said cams.

2. A pumping j ack of the class described, consisting of a. unitarystructure comprising a suitable frame, adapted to be disposed incoactingA relation to a pump rod, shafts mounted in said frame in spacedrelation to each other7 a Wiper cam mounted upon each shaft, a pump rodconnector having its end portion arranged intermediate the cams forimpingement thereby as the said cams are operated, guide means for saidconnector, gear elements for actuating said shafts, and means fordriving said gear elements.

3. A pumping jack of the class described comprising a frame havingattachinglmeans at its base portion, a guide bracket secured to eachside of said frame and projecting in- Wardly thereof, cam shaftsjournaled in said frame7 volutecams adjustably secured to said shafts, apump rod connector arranged to move vertically between the bracketsaforesaid and having a cross pin at one end slidab'ly engaging thebrackets to guide the connecten a relatively large gear mounted uponeach of the shafts, and a driving pinion arranged intermediate the saidgears for actuating the same and driving the cams in the same direction,and means for actuating said gear elements.

4. A pump jack attachment comprising a suitable frame having attachingmeans at its base, upper and lower cam shafts journaled in said frame, apump rod connector slotted to receive one of said shafts for guidingpurposes and having a cross pin at its upper end arranged between theshafts, cams on said shafts adapted to engage the pin for actuating thepump rod in opposite directions, and guide means on said frame withwhich the pin co-acts to sustain the connector in proper position duringreciprocation.

ln testimony whereof I aix my signature.

ELZA RHODY.

Copies of this patent may be obtained for ive cents each, by addressingthe Commissioner of Patents. Washington, D. 6.

